s3c-hsudc: Add regulator handling
From: Heiko Stuebner <heiko.stuebner@...> Date: Tue, 29 Nov 2011 15:30:41 +0100
Commit-Message
The udc has three supplies: vdda (3.3V), vddi (1.2V) and vddosc (1.8-3.3V). When CONFIG_REGULATOR is active use these to turn udc power on and off on start and stop calls. Signed-off-by: Heiko Stuebner <heiko@...>
Patch-Comment
drivers/usb/gadget/s3c-hsudc.c | 51 ++++++++++++++++++++++++++++++++++++++++ 1 files changed, 51 insertions(+), 0 deletions(-)
Statistics
- 51 lines added
- 0 lines removed
Changes
------------------------ drivers/usb/gadget/s3c-hsudc.c ------------------------
index 74be824..6872dee 100644
@@ -29,6 +29,10 @@
#include <linux/usb/otg.h>
#include <linux/prefetch.h>
+#ifdef CONFIG_REGULATOR
+#include <linux/regulator/consumer.h>
+#endif
+
#include <mach/regs-s3c2443-clock.h>
#include <plat/udc.h>
@@ -87,6 +91,14 @@
#define DATA_STATE_XMIT (1)
#define DATA_STATE_RECV (2)
+#ifdef CONFIG_REGULATOR
+static const char *s3c_hsudc_supply_names[] = {
+ "vdda", /* analog phy supply, 3.3V */
+ "vddi", /* digital phy supply, 1.2V */
+ "vddosc" /* oscillator supply, 1.8V - 3.3V */
+};
+#endif
+
/**
* struct s3c_hsudc_ep - Endpoint representation used by driver.
* @ep: USB gadget layer representation of device endpoint.
@@ -139,6 +151,9 @@ struct s3c_hsudc {
struct device *dev;
struct s3c24xx_hsudc_platdata *pd;
struct otg_transceiver *transceiver;
+#ifdef CONFIG_REGULATOR
+ struct regulator_bulk_data supplies[ARRAY_SIZE(s3c_hsudc_supply_names)];
+#endif
spinlock_t lock;
void __iomem *regs;
struct resource *mem_rsrc;
@@ -1162,6 +1177,15 @@ static int s3c_hsudc_start(struct usb_gadget_driver *driver,
return ret;
}
+#ifdef CONFIG_REGULATOR
+ ret = regulator_bulk_enable(ARRAY_SIZE(hsudc->supplies),
+ hsudc->supplies);
+ if (ret != 0) {
+ dev_err(hsudc->dev, "failed to enable supplies: %d\n", ret);
+ goto err_supplies;
+ }
+#endif
+
ret = bind(&hsudc->gadget);
if (ret) {
dev_err(hsudc->dev, "%s: bind failed\n", hsudc->gadget.name);
@@ -1190,6 +1214,10 @@ static int s3c_hsudc_start(struct usb_gadget_driver *driver,
err_otg:
driver->unbind(&hsudc->gadget);
err_bind:
+#ifdef CONFIG_REGULATOR
+ regulator_bulk_disable(ARRAY_SIZE(hsudc->supplies), hsudc->supplies);
+err_supplies:
+#endif
device_del(&hsudc->gadget.dev);
hsudc->driver = NULL;
@@ -1223,6 +1251,10 @@ static int s3c_hsudc_stop(struct usb_gadget_driver *driver)
device_del(&hsudc->gadget.dev);
disable_irq(hsudc->irq);
+#ifdef CONFIG_REGULATOR
+ regulator_bulk_disable(ARRAY_SIZE(hsudc->supplies), hsudc->supplies);
+#endif
+
dev_info(hsudc->dev, "unregistered gadget driver '%s'\n",
driver->driver.name);
return 0;
@@ -1265,6 +1297,9 @@ static int s3c_hsudc_probe(struct platform_device *pdev)
struct s3c_hsudc *hsudc;
struct s3c24xx_hsudc_platdata *pd = pdev->dev.platform_data;
int ret;
+#ifdef CONFIG_REGULATOR
+ int i;
+#endif
hsudc = kzalloc(sizeof(struct s3c_hsudc) +
sizeof(struct s3c_hsudc_ep) * pd->epnum,
@@ -1281,6 +1316,18 @@ static int s3c_hsudc_probe(struct platform_device *pdev)
hsudc->transceiver = otg_get_transceiver();
+#ifdef CONFIG_REGULATOR
+ for (i = 0; i < ARRAY_SIZE(hsudc->supplies); i++)
+ hsudc->supplies[i].supply = s3c_hsudc_supply_names[i];
+
+ ret = regulator_bulk_get(dev, ARRAY_SIZE(hsudc->supplies),
+ hsudc->supplies);
+ if (ret != 0) {
+ dev_err(dev, "failed to request supplies: %d\n", ret);
+ goto err_supplies;
+ }
+#endif
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(dev, "unable to obtain driver resource data\n");
@@ -1364,6 +1411,10 @@ err_remap:
kfree(hsudc->mem_rsrc);
err_res:
+#ifdef CONFIG_REGULATOR
+ regulator_bulk_free(ARRAY_SIZE(hsudc->supplies), hsudc->supplies);
+err_supplies:
+#endif
kfree(hsudc);
return ret;
}